EP0155917A2 - Electric-power-supplying roller assembly for continuous wire annealing plants - Google Patents

Electric-power-supplying roller assembly for continuous wire annealing plants Download PDF

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Publication number
EP0155917A2
EP0155917A2 EP85830059A EP85830059A EP0155917A2 EP 0155917 A2 EP0155917 A2 EP 0155917A2 EP 85830059 A EP85830059 A EP 85830059A EP 85830059 A EP85830059 A EP 85830059A EP 0155917 A2 EP0155917 A2 EP 0155917A2
Authority
EP
European Patent Office
Prior art keywords
wire
sleeve
roller
arc
winding
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP85830059A
Other languages
German (de)
French (fr)
Other versions
EP0155917A3 (en
EP0155917B1 (en
Inventor
Sebastiano Parasiliti
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
DE ANGELI INDUSTRIE SpA
Original Assignee
DE ANGELI INDUSTRIE Srl
ANGELI IND Srl
DE ANGELI INDUSTRIE SpA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by DE ANGELI INDUSTRIE Srl, ANGELI IND Srl, DE ANGELI INDUSTRIE SpA filed Critical DE ANGELI INDUSTRIE Srl
Priority to AT85830059T priority Critical patent/ATE46366T1/en
Publication of EP0155917A2 publication Critical patent/EP0155917A2/en
Publication of EP0155917A3 publication Critical patent/EP0155917A3/en
Application granted granted Critical
Publication of EP0155917B1 publication Critical patent/EP0155917B1/en
Expired legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/0004—Devices wherein the heating current flows through the material to be heated
    • H05B3/0009—Devices wherein the heating current flows through the material to be heated the material to be heated being in motion
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • C21D9/54—Furnaces for treating strips or wire
    • C21D9/56—Continuous furnaces for strip or wire
    • C21D9/62—Continuous furnaces for strip or wire with direct resistance heating

Definitions

  • the object of the present invention is to provide an electric-power-supplying roller assembly which can avoid the disadvantage mentioned above.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Electroplating Methods And Accessories (AREA)
  • Ropes Or Cables (AREA)
  • Wire Processing (AREA)

Abstract

In a plant for the continuous annealing of steel wire, in which an electrical potential difference is applied to pairs of consecutive rollers (1) to heat the wire (3) by the Joule effect, each roller (1) has a sleeve constituted by electrically-conductive segments (12) which are insulated from each other and which are engaged by brushes (13) connected to a voltage source. The brushes (13) engage a portion of the sleeve of the roller (1) having an angular extent less than the arc of winding of the wire (3) on the roller (1), so as to avoid sparking as the wire (3) approaches and leaves the roller (1).

Description

  • The present invention relates to an electric-power-supplying roller assembly for plants for the continuous annealing of wire, particularly steel wire, including a heating chamber located downstream of a drawing machine, and.in which means are provided for applying an electrical potential difference between pairs of consecutive rollers for driving the wire, to cause a current to pass through the wire and anneal it by the Joule effect.
  • Each of the drive rollers for the wire is supported for free rotation and has an electrically-conductive sleeve to which voltage is applied by means of electrical sliding contacts, and the contact between each roller and the wire to be treated occurs along an arc of this sleeve.
  • In the zones in which the wire approaches and moves away from each roller, particularly the latter zones, extra currents arise which cause a spark. This spark is the cause of surface damage to the wire being worked, with a consequent reduction in its brightness and its market value.
  • The object of the present invention is to provide an electric-power-supplying roller assembly which can avoid the disadvantage mentioned above.
  • In order to achieve this object, the present invention provides an electric-power-supplying roller assembly for driving the wire in continuous wire annealing plants of the type specified above, the assembly including a wire drive roller which is supported rotatably and has an electrically-conductive sleeve to which a voltage is applied by means of electrical contacts sliding on the sleeve and connected to a voltage source, the contact between the roller and the wire occurring over an arc of the sleeve, characterised in that the sleeve comprises a plurality of electrically-conductive segments which are insulated from each other, and in that the electrical sliding contacts engage an angular portion of the sleeve which is within the arc of winding of the wire and has an angular extent such that a voltage is not applied to the segments at the ends of the arc.
  • Further characteristics and advantages will become apparent from the detailed description of a preferred embodiment of the invention, illustrated by way of example in the appended drawings, in which:
    • Figure 1 shows a plant in which rollers according to the present invention are used, and
    • Figure 2 shows the roller assembly of the invention in perspective and in detail, while it is engaged by a wire which is to be thermally treated.
  • With reference to the drawings, the electrical-power-supplying roller formed in accordance with the present invention is generally indicated 1.
  • This roller is intended to be used in a plant 2 (Figure 1) for drawing and annealing a wire 3.
  • The plant 2 includes a device 4 for unwinding the wire 3, a wire-drawing machine 5, an annealing device 6, and a device 7 for rewinding the wire.
  • The annealing device 6 is constituted by a heating chamber 8 and a subsequent cooling chamber 9.
  • Two consecutive pairs of rollers 1 are provided in the heating chamber 8 and an electrical-potential difference is applied to each pair of rollers so as to induce the passage of a current for annealing the wire 3 by the Joule effect.
  • As shown in Figure 2, each roller 1 has a sleeve 10 over an arc of which the wire 3 is wound.
  • This sleeve 10 has a structure similar to that of an electrical commutator of the type used in dynamo-electric machines, and includes a plurality of conductive segments which are insulated from each other by an annular insulating part 11 surrounding a central metal part lla of the roller 1.
  • The segments 12 form parts of bars 12a arranged parallel to the axis of the roller 1 and embedded in the insulating part 11.
  • The central metal part lla of the roller 1 is rotatably supported by a support structure, not illustrated in the drawing.
  • Sliding electrical contacts 13 engage the sleeve 10 of the roller 1 and are constituted, for example, by graphite brushes slidable in an arcuate support structure 14 and subject to the action of springs, not illustrated. The contacts 13 are connected in known manner to a common voltage source, not illustrated.
  • The contacts 13 engage an angular portion of the sleeve 10 which is within the arc of winding of the wire 3 on the sleeve 10, and has an angular extent slightly less than the extent of this arc.
  • The electrical contacts 13 include two circumferential series of contacts and the contacts of each series are staggered relative to those of the other series so as to cover the whole of the angular portion of the sleeve 10.
  • The arcuate support structure 14 for the contacts 13 is carried by a ring 14a fixed to the support structure (not illustrated) of the roller 1 by screws 15 which pass through circumferential slots 16 in the ring 14a. It is thus possible to adjust the angular position of all the contacts 13 relative to the arc of contact between the wire 3 and the sleeve 10 of the roller 1.
  • The structure described above allows the contacts 3 to apply a voltage only to those segments 12 which, at any moment, are in an angular portion of the roller 1 lying within the arc of winding of the wire 3 and having an extent less than the angular extent of this arc, whereby at the beginning of the arc of winding the wire 3 is in contact with a segment 12 to which no voltage is applied and, likewise, at the end of the arc of winding the wire moves away from a segment 12 to which no voltage is applied; thus,the object of avoiding the disadvantage due to sparking as the wire approaches and leaves the winding roller is avoided.

Claims (4)

1. Electric-power-supplying roller assembly for plants (2) for the continuous annealing of wire (3), particularly steel wire, of the type including means for applying an electrical potential difference between pairs of consecutive rollers (1) for driving the wire (3) to heat the wire (3) by the Joule effect, and in which each of the rollers (1) for driving the wire (3) is rotatably supported and has an electrically-conductive sleeve (10) to which a voltage is applied by means of contacts (13) sliding on the sleeve (10) and connected to a voltage source, characterised in that the sleeve (10) comprises a plurality of electrically-conductive segments (12) which are insulated from each other, and in that the electrical sliding contacts (13) engage an angular portion of the sleeve which is within the arc of winding of the wire (3) and has an angular extent such that a voltage is not applied to the segments (12) at the ends of the arc of winding.
2. Assembly according to Claim 1, characterised in that the electrical sliding contacts (13) engage an angular portion of the sleeve of the roller (1) for driving the wire, which is slightly smaller than the extent of the arc of winding of the wire (3) on the roller (1).
3. Aseembly according to Claim 1, characterised in that the sliding contacts (13) are constituted by brushes slidable radially in a support structure (14, 14a) which surrounds the sleeve of the roller (1), and in that means (15, 16) are provided for adjusting the angular position of the support structure (14, 14a).
4. Assembly according to Claim 3, characterised in that the support structure includes an arcuate portion (14) in which the brushes (13) are slidable, and a disc (14) having arcuate slots(16) in which fixing screws (15) are engaged.
EP85830059A 1984-03-09 1985-03-06 Electric-power-supplying roller assembly for continuous wire annealing plants Expired EP0155917B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85830059T ATE46366T1 (en) 1984-03-09 1985-03-06 CONTACT ROLLER DEVICE FOR SUPPLYING ELECTRICAL CURRENT IN CONTINUOUS WIRE ANNEALING PLANTS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT8421173U IT8421173V0 (en) 1984-03-09 1984-03-09 ELECTRIC CONTACT ROLLER STRUCTURE, ESPECIALLY FOR PLANTS FOR CONTINUOUS METALLIC WIRE SEWING.
IT2117384U 1984-03-09

Publications (3)

Publication Number Publication Date
EP0155917A2 true EP0155917A2 (en) 1985-09-25
EP0155917A3 EP0155917A3 (en) 1986-05-28
EP0155917B1 EP0155917B1 (en) 1989-09-13

Family

ID=11177864

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85830059A Expired EP0155917B1 (en) 1984-03-09 1985-03-06 Electric-power-supplying roller assembly for continuous wire annealing plants

Country Status (8)

Country Link
EP (1) EP0155917B1 (en)
JP (1) JPS61527A (en)
AT (1) ATE46366T1 (en)
DD (1) DD232930A5 (en)
DE (1) DE3572999D1 (en)
ES (1) ES285217Y (en)
HU (1) HU189966B (en)
IT (1) IT8421173V0 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1063306A2 (en) * 1999-03-30 2000-12-27 Sictra Machinery s.r.l. Joule effect continuous annealer for multiple wire drawing machines
EP1634970A3 (en) * 2004-09-08 2007-05-30 Luvata Oy Method and arrangement for annealing of metal strips
WO2010091709A1 (en) * 2009-02-12 2010-08-19 Maschinenfabrik Niehoff Gmbh & Co. Kg Arrangement, product, and method for attaching a contact tube to a shaft of a continuous resistance annealing system for wires
CN102189148A (en) * 2011-03-09 2011-09-21 张家港市棋瑞德机械制造有限公司 Forming device for flat metal wire rod

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105080779A (en) * 2015-08-10 2015-11-25 阜阳祥云木业有限公司 Wood plate painting rolling wheel

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE766288C (en) * 1942-10-22 1953-03-02 Werner & Pfleiderer Device for the continuous heat treatment of sheet metal strips by means of an electrical current to be passed directly through them
DE939704C (en) * 1952-08-26 1956-03-01 Walter Dr-Ing Reinecken Device for continuous annealing, hardening, quenching, tempering or the like of metallic profile material by means of electric current
DE1072760B (en) * 1960-01-07 Brown, Boveri R Cie. Aktiengesellschaft, Mannheim-Käfertal Contact device for the supply of electrical currents to moving metallic profile material
US3182167A (en) * 1962-01-23 1965-05-04 Ohio Crankshaft Co Resistance heating apparatus
GB1114261A (en) * 1964-03-11 1968-05-22 Gkn Somerset Wire Ltd Improvements in or relating to apparatus for improving the tensile properties of steel wire
JPS59222535A (en) * 1983-06-01 1984-12-14 Hitachi Ltd Current conducting roller

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1072760B (en) * 1960-01-07 Brown, Boveri R Cie. Aktiengesellschaft, Mannheim-Käfertal Contact device for the supply of electrical currents to moving metallic profile material
DE766288C (en) * 1942-10-22 1953-03-02 Werner & Pfleiderer Device for the continuous heat treatment of sheet metal strips by means of an electrical current to be passed directly through them
DE939704C (en) * 1952-08-26 1956-03-01 Walter Dr-Ing Reinecken Device for continuous annealing, hardening, quenching, tempering or the like of metallic profile material by means of electric current
US3182167A (en) * 1962-01-23 1965-05-04 Ohio Crankshaft Co Resistance heating apparatus
GB1114261A (en) * 1964-03-11 1968-05-22 Gkn Somerset Wire Ltd Improvements in or relating to apparatus for improving the tensile properties of steel wire
JPS59222535A (en) * 1983-06-01 1984-12-14 Hitachi Ltd Current conducting roller

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENTS ABSTRACTS OF JAPAN, vol. 9, no. 91 (C-277) [1814], 19th April 1985; & JP - A - 59 222 535 (HITACHI SEISAKUSHO K.K.) 14-12-1984 (Cat. P,X) *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1063306A2 (en) * 1999-03-30 2000-12-27 Sictra Machinery s.r.l. Joule effect continuous annealer for multiple wire drawing machines
EP1063306A3 (en) * 1999-03-30 2003-10-08 Sictra Machinery s.r.l. Joule effect continuous annealer for multiple wire drawing machines
EP1634970A3 (en) * 2004-09-08 2007-05-30 Luvata Oy Method and arrangement for annealing of metal strips
CN100436608C (en) * 2004-09-08 2008-11-26 奥托库姆普铜产品公司 Method and arrangement for annealing of strips
WO2010091709A1 (en) * 2009-02-12 2010-08-19 Maschinenfabrik Niehoff Gmbh & Co. Kg Arrangement, product, and method for attaching a contact tube to a shaft of a continuous resistance annealing system for wires
RU2510161C2 (en) * 2009-02-12 2014-03-20 Машиненфабрик Нихофф Гмбх Унд Ко. Кг System, article and method for attachment of contact tube to wire continuous annealing unit shaft with contact heating
CN102189148A (en) * 2011-03-09 2011-09-21 张家港市棋瑞德机械制造有限公司 Forming device for flat metal wire rod

Also Published As

Publication number Publication date
ATE46366T1 (en) 1989-09-15
EP0155917A3 (en) 1986-05-28
ES285217U (en) 1985-07-16
ES285217Y (en) 1986-04-01
DD232930A5 (en) 1986-02-12
IT8421173V0 (en) 1984-03-09
HUT37301A (en) 1985-11-28
HU189966B (en) 1986-08-28
EP0155917B1 (en) 1989-09-13
DE3572999D1 (en) 1989-10-19
JPH0465888B2 (en) 1992-10-21
JPS61527A (en) 1986-01-06

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